package DemoReview;

/**
 * 点名
 */
public class LeetCodeLCR173 {
    public int takeAttendance(int[] records) {
        int left = 0, right = records.length - 1;
        if (records[right] == right) return right + 1;
        while (left < right) {
            int mid = left + (right - left) / 2;
            if (records[mid] == mid) left = mid + 1;
            else right = mid;
        }
        return left;
    }
}
